dataconnect: fix cache key conflict on nighty integration tests runs

[dconeybe]

The nightly github actions runs of the .github/workflows/dataconnect.yml workflow would always fail to create new cache entries for the gradle build cache and avd cache due to the cache with the given name already existing. To remedy this, the caches now have the unique run_id appended.

For example, in https://github.com/firebase/firebase-android-sdk/actions/runs/13134051569/job/36645359232 the following errors (which were ignored) occurred when trying to save the cache, and will be fixed by this PR:

Failed to save: Unable to reserve cache with key gradle-cache-jqnvfzw6w7, another job may be creating this cache. More details: Cache already exists. Scope: refs/heads/main, Key: gradle-cache-jqnvfzw6w7, Version: 569019faed09f5f63af8a1ab2f5e0433d94f66e572509c03e0e3df35d24400c7
...
Failed to save: Unable to reserve cache with key avd-cache-zhdsn586je-api34, another job may be creating this cache. More details: Cache already exists. Scope: refs/heads/main, Key: avd-cache-zhdsn586je-api34, Version: f969ff318f56045ef08ffb47bd4c5184fcbdf11d730c56809adddc4140471d78

[github-actions]

Release note changes

No release note changes were detected. If you made changes that should be
present in the next release, ensure you've added an entry in the appropriate
CHANGELOG.md file(s).

[github-actions]

Vertex AI Mock Responses Check ⚠️

A newer major version of the mock responses for Vertex AI unit tests is available. update_responses.sh should be updated to clone the latest version of the responses: v6.1

[github-actions]

Test Results

 1 034 files  ±0   1 034 suites  ±0   34m 21s ⏱️ +13s
 5 888 tests ±0   5 866 ✅ ±0  22 💤 ±0  0 ❌ ±0 
11 839 runs  ±0  11 795 ✅ ±0  44 💤 ±0  0 ❌ ±0 

Results for commit 2cfa624. ± Comparison against base commit dedff68.

♻️ This comment has been updated with latest results.

[google-oss-bot]

Size Report ¹

Affected Products

No changes between base commit (dedff68) and merge commit (2c41a71).

Test Logs

• Base (dedff68): https://github.com/firebase/firebase-android-sdk/actions/runs/13209634079
• Merge (2c41a71): https://github.com/firebase/firebase-android-sdk/actions/runs/13209704686

1. https://storage.googleapis.com/firebase-sdk-metric-reports/r5wmQFQwPU.html

[google-oss-bot]

Coverage Report ¹

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Test Logs

• Merge (2c41a71): https://github.com/firebase/firebase-android-sdk/actions/runs/13209704686

1. https://storage.googleapis.com/firebase-sdk-metric-reports/ckZKu4KNKP.html