feat: adds azure metadata provider to cloudmeta pkg.

[VAveryanov8]

This adds azure metadata provider to cloudmeta pkg.

https://learn.microsoft.com/en-us/azure/virtual-machines/instance-metadata-service?tabs=linux#usage

I've tested this pr with official mock api from Azure - https://mockoon.com/mock-samples/azurecom-imds/ , but it's really far from real implementation, so it's better to validate this implementation against real Azure env.

Fixes: #4129

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Please make sure that:

• Code is split to commits that address a single change
• Commit messages are informative
• Commit titles have module prefix
• Commit titles have issue nr. suffix

[VAveryanov8]

This pr depends on #4154

[karol-kokoszka]

I've tested this pr with official mock api from Azure - https://mockoon.com/mock-samples/azurecom-imds/ , but it's really far from real implementation, so it's better to validate this implementation against real Azure env.

Created the request for IT to get the access to Azure.

Dear Karol Kokoszka,

We would like to let you know that we have received your request and a ticket has been created.
A support representative will be reviewing your request and will send you a personal response.

To view the status of the ticket or add comments, please visit
https://scylladb.freshservice.com/helpdesk/tickets/441

Thank you for your patience.

Sincerely,
ScyllaDB IT Department

[Michal-Leszczynski]

@VAveryanov8 please rebase on master so that it's easier to analyze the changes.

[VAveryanov8]

@VAveryanov8 please rebase on master so that it's easier to analyze the changes.

Done!

[VAveryanov8]

update: I've manually tested this package on a real azure vm - everything seems to be working as expected!

[VAveryanov8]

update: git rebase master