Skip cluster bundle push by default

[rlieberman-splunk]

Description

This PR sets the SPLUNK_SKIP_CLUSTER_BUNDLE_PUSH environment variable to true by default for all pods, which will skip the apply cluster-bundle command in splunk-ansible when the cluster manager pod comes up.

Key Changes

• Set SPLUNK_SKIP_CLUSTER_BUNDLE_PUSH=true in statefulsets
• Update docs with default value

Testing and Verification

• Unit tests updated

Related Issues

N/A

PR Checklist

• Code changes adhere to the project's coding standards.
• Relevant unit and integration tests are included.
• Documentation has been updated accordingly.
• All tests pass locally.
• The PR description follows the project's guidelines.

[coveralls]

Pull Request Test Coverage Report for Build 16812504145

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.009%) to 86.512%

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Totals
Change from base Build 16803884122:	0.009%
Covered Lines:	10705
Relevant Lines:	12374

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💛 - Coveralls

[patrykw-splunk]

LGTM!

[rlieberman-splunk]

This change is included in #1559.