[v5] Add new authority metadata

[hectormmg]

This pull request adds support for new SovCloud authority metadata in the @azure/msal-common package, enhancing authentication capabilities for France, Germany, and Singapore SovCloud environments. The changes primarily involve updating authority metadata and test constants to recognize these new hosts.

Authority metadata updates:

• Added new SovCloud authority entries for France (login.sovcloud-identity.fr), Germany (login.sovcloud-identity.de), and Singapore (login.sovcloud-identity.sg) to the rawMetdataJSON in AuthorityMetadata.ts.

Test constants updates:

• Added SovCloud host constants for France, Germany, and Singapore in CLOUD_HOSTS within StringConstants.ts.
• Updated METADATA_ALIASES in StringConstants.ts to include SovCloud aliases for France, Germany, and Singapore.

Release notes:

• Added a patch change file documenting the addition of new authority metadata for SovCloud environments.

[Copilot]

Pull request overview

Adds hardcoded authority metadata for additional SovCloud environments in @azure/msal-common, enabling instance discovery + endpoint metadata support for France, Germany, and Singapore SovCloud authority hosts.

Changes:

• Added new SovCloud entries to InstanceDiscoveryMetadata (preferred network/cache + aliases).
• Updated msal-common test-kit cloud host constants and alias mappings for the new SovCloud hosts.
• Added a Beachball patch change file for @azure/msal-common.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
lib/msal-common/src/authority/AuthorityMetadata.ts	Adds France/Germany/Singapore SovCloud entries to hardcoded instance discovery metadata.
lib/msal-common/test/test_kit/StringConstants.ts	Adds SovCloud hosts and metadata alias mappings used by authority metadata unit tests.
change/@azure-msal-common-b6feb9cb-1882-4142-b4ae-e3aa14d331e1.json	Patch change file documenting the new authority metadata support.

[Copilot]

New SovCloud hosts were added to CLOUD_HOSTS/METADATA_ALIASES, but TEST_CONFIG.CLOUD_DISCOVERY_METADATA (the sample instance discovery network response) still only contains the older clouds. This leaves the test-kit data inconsistent and can cause future tests that rely on CLOUD_DISCOVERY_METADATA to miss coverage for these new environments. Please update CLOUD_DISCOVERY_METADATA to include the France/Germany/Singapore SovCloud entries as well (preferred_network/preferred_cache/aliases).