Publish HTML docs for 1.1 RTL in addition to main

[jhand2]

Currently the docs workflow only publishes documentation for registers at main. To make it easier to look up registers for 1.x, also publish the registers from the patch_v1.1 branch.

This was tested on my fork of this repo. See sample output:

• Workflow run: https://github.com/jhand2/caliptra-rtl/actions/runs/12472498726
• main: https://jhand2.github.io/caliptra-rtl/main/internal-regs/?p=
• 1.1: https://jhand2.github.io/caliptra-rtl/v1_1/internal-regs/?p=

[jhand2]

Not sure what I'm supposed to do to bypass the test timestamp, since this is a documentation-only change:

Latest non-doc hash is d5cfea9be870d8539efef4462eef4b564d01553e
Error, submitted timestamp [1734735334] is outdated: it precedes the latest non-documentation commit to branch by more than an hour [1734981795]
Please rerun any internal/company proprietary testcases, which should invoke .github/scripts/stamp_repo.sh to attest to successful completion
DO NOT manually run stamp_repo.sh on your branch to bypass this step - the output timestamp/hash is used to verify internal testcase sign-off is successful

[calebofearth]

Thanks for doing this Jordan, nice improvement!
The hash check is firing because this PR modifies a yml file. The "doc-only" exception currently only applies to .md/.png files.
We could probably stand to except the workflow files as well - adding ! -path "*.github/workflows/* here: https://github.com/jhand2/caliptra-rtl/blob/docs_1_1/.github/workflows/pre-run-check.yml#L102 should do the trick.
A couple additional requests as part of this PR:

• Update https://github.com/jhand2/caliptra-rtl/blob/docs_1_1/.github/workflow_metadata/README.md to indicate that the hash check workflow also ignores updates to workflow yml files
• Update https://github.com/jhand2/caliptra-rtl/blob/docs_1_1/docs/CaliptraReleaseChecklist.md to include a task for updating doc_gen.yml to generate version-specific register documentation at the time of each new release.

[calebofearth]

Also, a topic for discussion in the WG: Do we go back and retroactively update the README from patch_v1.1 to point to these new pages?
We could just directly update the release collateral https://github.com/chipsalliance/caliptra-rtl/releases/tag/v1.1