Remove Commons Repo Workaround — Use Public npm for @sap/cds-dk and @sap/cds-mtxs

[akgarg06]

Describe your changes

Why

@sap/cds-mtxs@3.9.7 and @sap/cds-dk@9.9.5 (and later) are now published on public npm.
The previous workaround used SAP's internal Artifactory commons tarball URLs injected at CI runtime via secrets (SAP_CDS_MTXS_TARBALL, SAP_CDS_DK_TARBALL, NPM_AUTH_TOKEN) because these versions were not yet available publicly.
That workaround is no longer needed and has been fully removed.

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What Changed

Workflow files — removed the "Setup npm registry and pin SAP tarballs" step

All five workflows that had the secret-injecting tarball setup step have been cleaned up:

Workflow	Change
blackduck.yml	Replaced complex tarball-inject+install step with a plain npm install --legacy-peer-deps loop
multiTenancyDeployLocal.yml	Removed tarball step entirely
multiTenant_deploy_and_Integration_test.yml	Removed tarball step entirely
multiTenant_deploy_and_Integration_test_LatestVersion.yml	Removed tarball step entirely
cfdeploy.yml	Removed tarball step from both Deploy and SnapshotDeploy jobs

The secrets SAP_CDS_MTXS_TARBALL, SAP_CDS_DK_TARBALL, and NPM_AUTH_TOKEN are no longer referenced in any workflow.

pom.xml — updated cds.install-cdsdk.version to ^9

Replaced all hardcoded exact version values with the range specifier ^9, consistent with how @sap/cds-mtxs is already declared (^3) in the Maven plugin install arguments.

File	Old value	New value
multi-tenant/central-space/.../pom.xml	9.8.0	^9
multi-tenant/personal-space/.../pom.xml	9.3.1	^9
single-tenant/central-space/demoapp/pom.xml	8.0.2	^9
single-tenant/personal-space/demoapp/pom.xml	8.0.2	^9

The srv/pom.xml install arguments already used @sap/cds-mtxs@^3 and remain unchanged. With cds.install-cdsdk.version=^9, the full install command becomes:

npm install @sap/cds-dk@^9 @sap/cds-mtxs@^3 --no-save

package.json files — no change needed

All four multi-tenant package.json files already declare "@sap/cds-dk": "^9" and "@sap/cds-mtxs": "^3". These are correct and unchanged.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

Checklist before requesting a review

• I follow Java Development Guidelines for SAP
• I have tested the functionality on my cloud environment.
• I have provided sufficient automated/ unit tests for the code.
• I have increased or maintained the test coverage.
• I have ran integration tests on my cloud environment.
• I have validated blackduck portal for any vulnerability after my commit.