Adding guardrails to default use case params

[joshpalis]

Description

Adds a requiredParams field to the DefaultUseCases enum which is used validate the given request body of default use case request

Examples :

curl -i -XPOST "http://localhost:9200/_plugins/_flow_framework/workflow?use_case=semantic_search_with_cohere_embedding_query_enricher&provision=true" -H "Content-Type:application/json" -d '{"test_value" : "QFaXLdVUFfk7XYxqSOtweCvVxXS2l3Jsw1DeKhuR"}'
HTTP/1.1 400 Bad Request
X-OpenSearch-Version: OpenSearch/3.0.0-SNAPSHOT (opensearch)
content-type: application/json; charset=UTF-8
content-length: 157

{"error":"Missing the following required parameters for use case [semantic_search_with_cohere_embedding_query_enricher] : [create_connector.credential.key]"}

curl -i -XPOST "http://localhost:9200/_plugins/_flow_framework/workflow?use_case=multimodal_search_with_bedrock_titan&provision=true&?pretty" -H "Content-Type:application/json" -d '{"test_value" : "QFaXLdVUFfk7XYxqSOtweCvVxXS2l3Jsw1DeKhuR"}'
HTTP/1.1 400 Bad Request
X-OpenSearch-Version: OpenSearch/3.0.0-SNAPSHOT (opensearch)
content-type: application/json; charset=UTF-8
content-length: 231

{"error":"Missing the following required parameters for use case [multimodal_search_with_bedrock_titan] : [create_connector.credential.access_key, create_connector.credential.secret_key, create_connector.credential.session_token]"}

Issues Resolved

#655

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[codecov]

Codecov Report

Attention: Patch coverage is 57.14286% with 18 lines in your changes are missing coverage. Please review.

Project coverage is 72.20%. Comparing base (3c67cff) to head (613a83d).

Files	Patch %	Lines
...h/flowframework/rest/RestCreateWorkflowAction.java	12.50%	12 Missing and 2 partials ⚠️
...ensearch/flowframework/common/DefaultUseCases.java	84.61%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #658      +/-   ##
============================================
- Coverage     72.22%   72.20%   -0.02%     
- Complexity      680      682       +2     
============================================
  Files            82       82              
  Lines          3528     3562      +34     
  Branches        285      290       +5     
============================================
+ Hits           2548     2572      +24     
- Misses          854      859       +5     
- Partials        126      131       +5     

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[owaiskazi19]

LG overall with few comments

[dbwiddis]

LGTM generally. Lots of nits for your consideration. I'm traveling and unlikely to review again promptly so please don't wait on me to review again.

[owaiskazi19]

LGTM