backend/remote-state/azure: defaulting the Azure Backend to use MSAL

[tombuildsstuff]

This PR changes the default value of use_microsoft_graph within the Azure Backend from false to true - which was announced when this field was introduced in Terraform 1.1.

For end-users there should be no difference in obtaining a MSAL Token rather than an ADAL Token (although permissions changes may be needed for Microsoft Graph, rather than Azure Active Directory)

Fixes #30881

$ TF_ACC=1 envchain azurerm go test -v -timeout 900m ./internal/backend/remote-state/azure/...
=== RUN   TestBackend_impl
--- PASS: TestBackend_impl (0.00s)
=== RUN   TestBackendConfig
--- PASS: TestBackendConfig (0.00s)
=== RUN   TestBackendAccessKeyBasic
--- PASS: TestBackendAccessKeyBasic (109.04s)
=== RUN   TestBackendSASTokenBasic
--- PASS: TestBackendSASTokenBasic (103.46s)
=== RUN   TestBackendADALAzureADAuthBasic
--- PASS: TestBackendADALAzureADAuthBasic (119.88s)
=== RUN   TestBackendADALManagedServiceIdentityBasic
--- SKIP: TestBackendADALManagedServiceIdentityBasic (0.00s)
=== RUN   TestBackendADALServicePrincipalClientCertificateBasic
--- SKIP: TestBackendADALServicePrincipalClientCertificateBasic (0.00s)
=== RUN   TestBackendADALServicePrincipalClientSecretBasic
--- PASS: TestBackendADALServicePrincipalClientSecretBasic (170.48s)
=== RUN   TestBackendADALServicePrincipalClientSecretCustomEndpoint
--- SKIP: TestBackendADALServicePrincipalClientSecretCustomEndpoint (0.00s)
=== RUN   TestBackendMSALAzureADAuthBasic
--- PASS: TestBackendMSALAzureADAuthBasic (104.74s)
=== RUN   TestBackendMSALManagedServiceIdentityBasic
--- SKIP: TestBackendMSALManagedServiceIdentityBasic (0.00s)
=== RUN   TestBackendMSALServicePrincipalClientCertificateBasic
--- SKIP: TestBackendMSALServicePrincipalClientCertificateBasic (0.00s)
=== RUN   TestBackendMSALServicePrincipalClientSecretBasic
--- PASS: TestBackendMSALServicePrincipalClientSecretBasic (110.37s)
=== RUN   TestBackendMSALServicePrincipalClientSecretCustomEndpoint
--- SKIP: TestBackendMSALServicePrincipalClientSecretCustomEndpoint (0.00s)
=== RUN   TestBackendAccessKeyLocked
--- PASS: TestBackendAccessKeyLocked (104.40s)
=== RUN   TestBackendServicePrincipalLocked
--- PASS: TestBackendServicePrincipalLocked (105.28s)
=== RUN   TestRemoteClient_impl
--- PASS: TestRemoteClient_impl (0.00s)
=== RUN   TestRemoteClientAccessKeyBasic
--- PASS: TestRemoteClientAccessKeyBasic (100.07s)
=== RUN   TestRemoteClientManagedServiceIdentityBasic
--- SKIP: TestRemoteClientManagedServiceIdentityBasic (0.00s)
=== RUN   TestRemoteClientSasTokenBasic
--- PASS: TestRemoteClientSasTokenBasic (100.29s)
=== RUN   TestRemoteClientServicePrincipalBasic
--- PASS: TestRemoteClientServicePrincipalBasic (101.36s)
=== RUN   TestRemoteClientAccessKeyLocks
--- PASS: TestRemoteClientAccessKeyLocks (100.93s)
=== RUN   TestRemoteClientServicePrincipalLocks
--- PASS: TestRemoteClientServicePrincipalLocks (105.00s)
=== RUN   TestPutMaintainsMetaData
--- PASS: TestPutMaintainsMetaData (99.97s)
PASS
ok  	github.com/hashicorp/terraform/internal/backend/remote-state/azure	1535.389s

[jackofallops]

LGTM 👍

[manicminer]

Thanks @tombuildsstuff, LGTM 👍

[github-actions]

Reminder for the merging maintainer: if this is a user-visible change, please update the changelog on the appropriate release branch.

[github-actions]

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