fix isAppAlreadyInstalledo error handling

[patrykw-splunk]

Description

This PR aims to fix FIPS Error Handling:
Modified isAppAlreadyInstalled() and installApp() functions to properly handle FIPS provider informational messages in stderr by treating them as non-error conditions rather than installation failures.
Also added fanout CR status synchronization (installPhaseManager()) to ensure that when app installation fails after max retries on any replica, the main PhaseInfo is properly updated to reflect the overall deployment failure state.

Key Changes

FIPS error handling

• Modified isAppAlreadyInstalled() function to detect and ignore FIPS provider informational messages in stderr instead of treating them as errors
• Updated installApp() function to handle FIPS messages during app installation, preventing false installation failures
• Added FIPS message detection logic that checks for "FIPS provider enabled" string and logs as informational rather than error

Fanout CR Status Management

• Enhanced failure handling for fanout CRs (Standalone with multiple replicas) to properly update main PhaseInfo when max retries are reached
• Added synchronization logic to ensure overall deployment status reflects individual replica failures
• Improved status reporting by setting DeployStatus to Error when legitimate failures occur after retry exhaustion

Testing and Verification

TestRunLocalScopedPlaybook

✅ Fixed Test3: Now uses proper exit codes (fmt.Errorf("exit status 2")) instead of stderr-only failures
✅ Fixed Test4: Properly simulates grep exit code 1 for app-not-enabled scenarios
✅ Fixed Test6: Updated to test stderr content transparency

TestPremiumAppScopedPlaybook:
✅ Fixed Test3: Uses real error conditions with proper exit codes
✅ Fixed Test4: Corrected install failure simulation with err != nil
✅ Fixed Test5: Updated to test generic stderr content handling
✅ Fixed Test7: App-already-installed scenario with stderr content

TestIsAppAlreadyInstalled:
✅ Updated test cases to be FIPS-agnostic
✅ "stderr content" in test names and descriptions
✅ Tests now focus on behavior: stderr content should be ignored for error detection
✅ Comprehensive coverage: success, not-found, real errors, edge cases

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 19546229803

Details

• 29 of 37 (78.38%) changed or added relevant lines in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.003%) to 86.533%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/splunk/enterprise/afwscheduler.go	29	37	78.38%

Files with Coverage Reduction	New Missed Lines	%
pkg/splunk/enterprise/afwscheduler.go	1	92.78%

Totals
Change from base Build 19427516711:	-0.003%
Covered Lines:	10731
Relevant Lines:	12401

---

💛 - Coveralls