Add bottlerocket bootstrap container to release bundle files

[peirulu]

Description of changes:

• Add bootstrap container for vsphere-multi-network to bundle release files

Testing (if applicable):

make dev-release

• Check the bootstrap container added in dry run generated bundle

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[eks-distro-bot]

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[peirulu]

/hold

[peirulu]

/retest

[peirulu]

/retest

[peirulu]

/retest

[peirulu]

/test eks-anywhere-e2e-presubmit

[eks-distro-bot]

@peirulu: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
eks-anywhere-presubmit	e32c1b3	link	true	/test eks-anywhere-presubmit
eks-anywhere-e2e-presubmit	e32c1b3	link	true	/test eks-anywhere-e2e-presubmit

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