RDKEMW-12059: Fix Coverity identified issues

[dkumar798]

Reason for Change: Suppressed the Coverity identified issues
Risks: Low
Priority: P2
Signed-off-by:Dineshkumar P [dinesh_kumar2@comcast.com]

[Copilot]

Pull request overview

This PR addresses static-analysis (Coverity) findings across the GDial server by adding targeted suppressions and small code adjustments to reduce false positives and flagged patterns.

Changes:

• Add error-check logging around app-cache erase operations.
• Add Coverity suppression annotations for specific reported issues (printf args, deadcode, url manipulation, parameter hidden).
• Remove a redundant pointer nullification in the unit-test executable.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 4 comments.

File	Description
server/plat/gdialappcache.cpp	Adds an erase() return-code check/logging before inserting into the cache.
server/plat/gdial-plat-util.c	Adds a Coverity suppression for a printf_args report in logging.
server/gdialserver_ut.cpp	Removes a redundant testObject = nullptr; assignment after delete.
server/gdial-rest.c	Adds Coverity suppressions around dead-code paths and origin validation checks.

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[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated no new comments.

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[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

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