Add t.Parallel() to safe top-level tests in bootstrap_profile_runner_test.go (#56658)

Analyzed batch of 25 pkg/cli test files (bootstrap_profile_helpers through codemod_difc_proxy). Most already had t.Parallel() or were unsafe (t.Setenv/os state). Only TestBootstrapActionNeedsMutation and TestPrintBootstrapConfigTODO_PreservesManifestOrder in bootstrap_profile_runner_test.go were safe to parallelize.

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