uses new custom actions for GHA workflows

[JBAhire]

Description

This PR uses new custom actions for

• Gradle
• Validate charts and publish

changes as per discussions here: hypertrace/query-service#47

Testing

tested changes here: #65

Checklist:

• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• Any dependent changes have been merged and published in downstream modules

Documentation

• adds gradle action and modifies update-charts action actions#9

[codecov]

Codecov Report

Merging #66 (9b912ca) into main (3f8924f) will decrease coverage by 12.94%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##               main      #66       +/-   ##
=============================================
- Coverage     80.71%   67.77%   -12.95%     
+ Complexity      222      203       -19     
=============================================
  Files            27       24        -3     
  Lines           752      692       -60     
  Branches         56       56               
=============================================
- Hits            607      469      -138     
- Misses           98      187       +89     
+ Partials         47       36       -11     

Flag	Coverage Δ	Complexity Δ
integration	?	?
unit	67.77% <ø> (ø)	0.00 <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ	Complexity Δ
...tribute/service/model/AttributeMetadataDocKey.java	0.00% <0.00%> (-100.00%)	0.00% <0.00%> (ø%)
...e/core/attribute/service/AttributeServiceImpl.java	27.72% <0.00%> (-45.05%)	11.00% <0.00%> (ø%)
.../core/attribute/service/AttributeServiceEntry.java
...tribute/service/client/AttributeServiceClient.java
...ce/client/config/AttributeServiceClientConfig.java

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[github-actions]

Unit Test Results

20 files  20 suites   9s ⏱️
75 tests 75 ✔️ 0 💤 0 ❌

Results for commit 59e0854.