fix: Fix mongodbatlas_clusters plural data source to set auto_scaling_disk_gb_enabled attribute correctly

[maastha]

Description

This PR fixes auto_scaling_disk_gb_enabled to be set correctly in the plural mongodbatlas_clusters data source for all results. Currently this is being set to BackupEnabled attribute from the API response.

Link to any related issue(s):

Type of change:

• Bug fix (non-breaking change which fixes an issue). Please, add the "bug" label to the PR.
• New feature (non-breaking change which adds functionality). Please, add the "enhancement" label to the PR.
• Breaking change (fix or feature that would cause existing functionality to not work as expected). Please, add the "breaking change" label to the PR.
• This change requires a documentation update
• Documentation fix/enhancement

Required Checklist:

• I have signed the MongoDB CLA
• I have read the contribution guidelines
• I have checked that this change does not generate any credentials and that they are NOT accidentally logged anywhere.
• I have added tests that prove my fix is effective or that my feature works per HashiCorp requirements
• I have added any necessary documentation (if appropriate)
• I have run make fmt and formatted my code
• If changes include deprecations or removals, I defined an isolated PR with a relevant title as it will be used in the auto-generated changelog.

Further comments

[github-actions]

Package	Line Rate	Health
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github.com/mongodb/terraform-provider-mongodbatlas/internal/common/dsschema	100%	✔
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github.com/mongodb/terraform-provider-mongodbatlas/internal/service/apikey	3%	❌
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github.com/mongodb/terraform-provider-mongodbatlas/internal/service/encryptionatrest	0%	❌
github.com/mongodb/terraform-provider-mongodbatlas/internal/service/eventtrigger	1%	❌
github.com/mongodb/terraform-provider-mongodbatlas/internal/service/federateddatabaseinstance	3%	❌
github.com/mongodb/terraform-provider-mongodbatlas/internal/service/federatedquerylimit	4%	❌
github.com/mongodb/terraform-provider-mongodbatlas/internal/service/federatedsettingsidentityprovider	1%	❌
github.com/mongodb/terraform-provider-mongodbatlas/internal/service/federatedsettingsorgconfig	3%	❌
github.com/mongodb/terraform-provider-mongodbatlas/internal/service/federatedsettingsorgrolemapping	2%	❌
github.com/mongodb/terraform-provider-mongodbatlas/internal/service/globalclusterconfig	1%	❌
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github.com/mongodb/terraform-provider-mongodbatlas/internal/service/ldapverify	2%	❌
github.com/mongodb/terraform-provider-mongodbatlas/internal/service/maintenancewindow	2%	❌
github.com/mongodb/terraform-provider-mongodbatlas/internal/service/networkcontainer	2%	❌
github.com/mongodb/terraform-provider-mongodbatlas/internal/service/networkpeering	1%	❌
github.com/mongodb/terraform-provider-mongodbatlas/internal/service/onlinearchive	3%	❌
github.com/mongodb/terraform-provider-mongodbatlas/internal/service/organization	3%	❌
github.com/mongodb/terraform-provider-mongodbatlas/internal/service/orginvitation	2%	❌
github.com/mongodb/terraform-provider-mongodbatlas/internal/service/privateendpointregionalmode	3%	❌
github.com/mongodb/terraform-provider-mongodbatlas/internal/service/privatelinkendpoint	2%	❌
github.com/mongodb/terraform-provider-mongodbatlas/internal/service/privatelinkendpointserverless	1%	❌
github.com/mongodb/terraform-provider-mongodbatlas/internal/service/privatelinkendpointservice	1%	❌
github.com/mongodb/terraform-provider-mongodbatlas/internal/service/privatelinkendpointservicedatafederationonlinearchive	3%	❌
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Summary	5% (573 / 10815)	❌

[andreaangiolillo]

LGTM

[lantoli]

can we change/add some tests that fail before this change and pass after?

[github-actions]

This PR has gone 7 days without any activity and meets the project’s definition of "stale". This will be auto-closed if there is no new activity over the next 7 days. If the issue is still relevant and active, you can simply comment with a "bump" to keep it open, or add the label "not_stale". Thanks for keeping our repository healthy!

[maastha]

bump