[Modules] Improve disk encryption options to VM and VMSS

[eriqua]

Description

• Remove enableServerSideEncryption parameter. SSE is by default with Platform Managed Keys (PMK) on VM disks. To configure SSE+CMK or SSE+CMK&PMK, a disk encryption set resource ID can be referenced as part of the creation of osDisks and dataDisks. This is aligning the approach for osDisk and dataDisks, addressing issue Difference between VM Disk CMK encryption for OS and Data disks #2237 and discussion Difference between VM Disk CMK encryption for OS and Data disks #2235
• Update naming to align to the latest approach. Rename def to com for common tests, rename adp-* to dep-* for dependencies
• Update references to the Disk Encryption extension to Azure Disk Encryption extension. Update extensionAzureDiskEncryptionConfig parameter description, specifying restrictions on the usage of the ADE extension when encryptionathost and SSE+CMK is in place.
• Update parameter usage for osDisk and datatDisk on how to enable SSE+CMK.
• Add note on restictions to osDisk, datatDisk and extensionAzureDiskEncryptionConfig parameter usage

Pipeline references

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Pipeline

Type of Change

Please delete options that are not relevant.

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Update to documentation

Checklist

• I'm sure there are no other open Pull Requests for the same update/change
• My corresponding pipelines / checks run clean and green without any errors or warnings
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (readme)
• I did format my code