Added managed identities for ACR container pulls

[ericwolz]

Checklist

• I have read the contribution guidelines.
• I added or modified the existing tests to cover the change (we do not allow our test coverage to go down).
• This pull-request is submitted against the main branch.

Description of the changes

Reference/Link to the issue solved with this PR (if any)

[timtay-microsoft]

FYI it looks like we lapsed on some security vulnerabilities and that is blocking your gate here.

/mnt/vss/_work/1/s/e2e/test/E2ETests.csproj : error NU1902: Warning As Error: Package 'Azure.Identity' 1.11.2 has a known moderate severity vulnerability, https://github.com/advisories/GHSA-m5vv-6r4h-3vj9 [/mnt/vss/_work/1/s/azureiot.sln]
/mnt/vss/_work/1/s/iothub/service/samples/how to guides/RoleBasedAuthenticationSample/RoleBasedAuthenticationSample.csproj : error NU1902: Package 'Azure.Identity' 1.11.2 has a known moderate severity vulnerability, https://github.com/advisories/GHSA-m5vv-6r4h-3vj9 [/mnt/vss/_work/1/s/azureiot.sln]
/mnt/vss/_work/1/s/provisioning/service/samples/how to guides/GroupCertificateVerificationSample/GroupCertificateVerificationSample.csproj : error NU1902: Package 'BouncyCastle' 1.8.9 has a known moderate severity vulnerability, https://github.com/advisories/GHSA-8xfc-gm6g-vgpv [/mnt/vss/_work/1/s/azureiot.sln]
/mnt/vss/_work/1/s/provisioning/service/samples/how to guides/GroupCertificateVerificationSample/GroupCertificateVerificationSample.csproj : error NU1902: Package 'BouncyCastle' 1.8.9 has a known moderate severity vulnerability, https://github.com/advisories/GHSA-m44j-cfrm-g8qc [/mnt/vss/_work/1/s/azureiot.sln]
/mnt/vss/_work/1/s/provisioning/service/samples/how to guides/GroupCertificateVerificationSample/GroupCertificateVerificationSample.csproj : error NU1902: Package 'BouncyCastle' 1.8.9 has a known moderate severity vulnerability, https://github.com/advisories/GHSA-v435-xc8x-wvr9 [/mnt/vss/_work/1/s/azureiot.sln]

You will probably need to bump those versions to unblock this PR

[timtay-microsoft]

/azp run

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Azure Pipelines successfully started running 1 pipeline(s).

[timtay-microsoft]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).