fix(pipeline): prevent cache miss due to pipeline options mutation during chart extraction (#3300)

* fix(pipeline): prevent cache miss due to pipeline options mutation

Use local variable instead of mutating shared options object, preventing cache miss.

Signed-off-by: Hemanth Battu <hbattu@ibm.com>

* test(pipeline): add regression test for chart extraction cache miss

Signed-off-by: Hemanth Battu <hbattu@ibm.com>

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Signed-off-by: Hemanth Battu <hbattu@ibm.com>
Co-authored-by: Hemanth Battu <hbattu@ibm.com>