e2e: add ranking tests for atom boosting

This adds two cases which are exact phrases to search for.

"assets are not configured for this binary" finds the correct document,
but it isn't shown in the summary. Our target rank doesn't capture that
this could be better, but I will use the golden file to see if I improve
this.

"sourcegraph/server docker image build" is an example of an exact phrase
which also happens to contain words of highly ranked symbols. This leads
to the exact phrase getting buried. I want to see if I can boost that.

Test Plan: go test

internal/e2e/e2e_rank_test.go

@@ -61,6 +61,10 @@ func TestRanking(t *testing.T) {
 		// cody
 		q("generate unit test", "github.com/sourcegraph/cody/lib/shared/src/chat/recipes/generate-test.ts"),
 		q("r:cody sourcegraph url", "github.com/sourcegraph/cody/lib/shared/src/sourcegraph-api/graphql/client.ts"),
+
+		// exact phrases
+		q("assets are not configured for this binary", "github.com/sourcegraph/sourcegraph/ui/assets/assets.go"),
+		q("sourcegraph/server docker image build", "github.com/sourcegraph/sourcegraph/dev/tools.go"),
 	}
 
 	var indexDir string

internal/e2e/testdata/assets_are_not_configured_for_this_binary.txt

@@ -0,0 +1,41 @@
+queryString: assets are not configured for this binary
+query: (and substr:"assets" substr:"are" substr:"not" substr:"configured" substr:"for" substr:"this" substr:"binary")
+targetRank: 1
+
+**github.com/sourcegraph/sourcegraph/ui/assets/assets.go**
+33:func (p FailingAssetsProvider) Assets() http.FileSystem {
+14:	Assets() http.FileSystem
+1:package assets
+hidden 12 more line matches
+
+github.com/sourcegraph/sourcegraph/schema/schema.go
+492:type BrandAssets struct {
+1530:type Notice struct {
+1538:type Notifications struct {
+hidden 668 more line matches
+
+github.com/sourcegraph/sourcegraph/doc/admin/executors/deploy_executors.md
+118:## Confirm executors are working
+194:### Configuring the auth config for use in executors
+216:### Adding certificates to a binary deployment
+hidden 47 more line matches
+
+github.com/sourcegraph/sourcegraph/doc/getting-started/github-vs-sourcegraph.md
+8:## Which is best for you?
+110:### Searching repositories, branches, and forks
+18:As your codebase grows in complexity, the value of code search quickly increases. Sourcegraph may be a good fit for your team if:
+hidden 66 more line matches
+
+github.com/sourcegraph/sourcegraph/doc/admin/executors/deploy_executors_terraform.md
+1:# Deploying Sourcegraph executors using Terraform on AWS or GCP
+56:## Terraform Version
+415:### **Step 1:** Update the source version of the terraform modules
+hidden 68 more line matches
+
+github.com/sourcegraph/sourcegraph/doc/dev/background-information/sg/reference.md
+496:### sg lint format
+505:### sg lint format
+1:<!-- DO NOT EDIT: generated via: go generate ./dev/sg -->
+hidden 265 more line matches
+
+hidden 3 more file matches

internal/e2e/testdata/rank_stats.txt

@@ -1,4 +1,4 @@
-queries: 9
-recall@1: 5 (56%)
-recall@5: 7 (78%)
-mrr: 0.658249
+queries: 11
+recall@1: 6 (55%)
+recall@5: 8 (73%)
+mrr: 0.635970

internal/e2e/testdata/sourcegraphserver_docker_image_build.txt

@@ -0,0 +1,41 @@
+queryString: sourcegraph/server docker image build
+query: (and substr:"sourcegraph/server" substr:"docker" substr:"image" substr:"build")
+targetRank: 14
+
+github.com/sourcegraph/sourcegraph/dev/sg/internal/images/images.go
+458:	Build       int
+234:type ImageReference struct {
+352:type ErrNoImage struct {
+hidden 118 more line matches
+
+github.com/sourcegraph/sourcegraph/doc/admin/external_services/postgres.md
+41:### sourcegraph/server
+192:### sourcegraph/server
+53:### Docker Compose
+hidden 19 more line matches
+
+github.com/sourcegraph/sourcegraph/internal/conf/deploy/deploytype.go
+66:func IsDeployTypePureDocker(deployType string) bool {
+12:	SingleDocker  = "docker-container"
+13:	DockerCompose = "docker-compose"
+hidden 19 more line matches
+
+github.com/sourcegraph/sourcegraph/schema/schema.go
+2621:	ExecutorsBatcheshelperImage string `json:"executors.batcheshelperImage,omitempty"`
+2627:	ExecutorsLsifGoImage string `json:"executors.lsifGoImage,omitempty"`
+2631:	ExecutorsSrcCLIImage string `json:"executors.srcCLIImage,omitempty"`
+hidden 22 more line matches
+
+github.com/sourcegraph/sourcegraph/internal/updatecheck/handler.go
+40:	latestReleaseDockerServerImageBuild = newPingResponse("5.1.8")
+45:	latestReleaseKubernetesBuild = newPingResponse("5.1.8")
+50:	latestReleaseDockerComposeOrPureDocker = newPingResponse("5.1.8")
+hidden 19 more line matches
+
+github.com/sourcegraph/sourcegraph/doc/admin/deploy/docker-single-container/index.md
+1:# Docker Single Container Deployment
+294:### Insiders build
+238:### File system performance on Docker for Mac
+hidden 52 more line matches
+
+hidden 15 more file matches