[CI] Cypress test run spec input (#5142)

Originally:
#5134

I believed it to be a good idea to ensure that triggering the CI
should always run a batch of tests. But I realized that some tests
can be added and just be bad tests until updated. Or if we want
to verify a flaky test in the CI.

So instead of only making it additional tests, the spec input will
complete replace the default tests (unless you append to the default).

Empty will run the default spec still. This will append on to the
PR comment with the spec that was run. So at least maintainers can
see it passed for a set of tests but it did not run the ones
we usually run.

Also adding some formatting for empty values for the PR comment.

Issue related:
#4019

Signed-off-by: Kawika Avilla <kavilla414@gmail.com>

.github/workflows/cypress_workflow.yml

@@ -22,20 +22,20 @@ on:
         required: false
         type: number
       specs:
-        description: 'Additional tests to run'
+        description: 'Tests to run (default: core)'
+        default: 'cypress/integration/core-opensearch-dashboards/opensearch-dashboards/**/*.js,'
         required: false
         type: string
 
 env:
   SOURCE_REPO: ${{ github.repository }}
-  SOURCE_BRANCH: ${{ github.base_ref }}
+  SOURCE_BRANCH: "${{ github.base_ref }}"
   TEST_REPO: ${{ inputs.test_repo != '' && inputs.test_repo || 'opensearch-project/opensearch-dashboards-functional-test' }}
   TEST_BRANCH: "${{ inputs.test_branch != '' && inputs.test_branch || github.base_ref }}"
   FTR_PATH: 'ftr'
   START_CMD: 'node ../scripts/opensearch_dashboards --dev --no-base-path --no-watch'
   OPENSEARCH_SNAPSHOT_CMD: 'node ../scripts/opensearch snapshot'
-  SPEC: 'cypress/integration/core-opensearch-dashboards/opensearch-dashboards/**/*.js,'
-  ADDITIONAL_SPEC: ${{ inputs.specs != '' && inputs.specs || '' }}
+  SPEC: ${{ inputs.specs != '' && inputs.specs || 'cypress/integration/core-opensearch-dashboards/opensearch-dashboards/**/*.js,' }} 
   CYPRESS_BROWSER: 'chromium'
   CYPRESS_VISBUILDER_ENABLED: true
   CYPRESS_DATASOURCE_MANAGEMENT_ENABLED: false
@@ -129,7 +129,7 @@ jobs:
           working-directory: ${{ env.FTR_PATH }}
           start: ${{ env.OPENSEARCH_SNAPSHOT_CMD }}, ${{ env.START_CMD }}
           wait-on: 'http://localhost:9200, http://localhost:5601'
-          command: yarn cypress:run-without-security --browser ${{ env.CYPRESS_BROWSER }} --spec ${{ env.SPEC }}${{ env.ADDITIONAL_SPEC }}
+          command: yarn cypress:run-without-security --browser ${{ env.CYPRESS_BROWSER }} --spec ${{ env.SPEC }}
 
       # Screenshots are only captured on failure, will change this once we do visual regression tests
       - uses: actions/upload-artifact@v3
@@ -180,10 +180,13 @@ jobs:
 
             #### Inputs:
             Source repo: `${{ env.SOURCE_REPO }}`
-            Source branch: `${{ env.SOURCE_BRANCH }}`
+            Source branch: ``${{ env.SOURCE_BRANCH }}``
             Test repo: `${{ env.TEST_REPO }}`
             Test branch: ``${{ env.TEST_BRANCH }}``
 
+            Test spec:
+            `${{ env.SPEC }}`
+
             #### Link to results: 
             ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
           edit-mode: replace