Fix panic in Analyzer Manager execution

[yahavi]

• All tests passed. If this feature is not already covered by the tests, I added new tests.
• All static analysis checks passed.
• This pull request is on the dev branch.
• I used gofmt for formatting the code before submitting the pull request.

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Fix the following issue:

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x8 pc=0xc0a696]
goroutine 1 [running]:
os.(*ProcessState).exited(...)
/usr/local/go/src/os/exec_posix.go:83
os.(*ProcessState).Exited(...)
/usr/local/go/src/os/exec.go:155
github.com/jfrog/jfrog-cli-core/v2/xray/utils.(*AnalyzerManager).Exec.func1()
/home/frogger/go/pkg/mod/github.com/jfrog/jfrog-cli-core/[email protected]/xray/utils/analyzermanager.go:105 +0x36
github.com/jfrog/jfrog-cli-core/v2/xray/utils.(*AnalyzerManager).Exec(0xc0000aeda0, {0xc0005f8600, 0x36}, {0x110cfbd, 0x2}, 0xc0005d5400?)
/home/frogger/go/pkg/mod/github.com/jfrog/jfrog-cli-core/[email protected]/xray/utils/analyzermanager.go:113 +0x1a9
github.com/jfrog/jfrog-cli-core/v2/xray/audit/jas.(*ApplicabilityScanManager).runAnalyzerManager(...)
/home/frogger/go/pkg/mod/github.com/jfrog/jfrog-cli-core/[email protected]/xray/audit/jas/applicabilitymanager.go:159