feat: add toggling for the hardcode support link

[DmytroAlipov]

This is a backport from master branch

Description:

Added a toggling mechanism for the unlink all social media accounts text to display it as a link or text depending on the MFE env setting.
The link currently leads to https://support.edx.org/hc/en-us/articles/207206067 which is hardcoded. I suggest adding the variable SUPPORT_URL_TO_UNLINK_SOCIAL_MEDIA_ACCOUNT to control whether this text is displayed as a link or as plain text (if this variable is not set to a value). By default, the link leads to the Edx support page. But now it is possible to set some other support URL at the deployment level.

Before:

After:

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[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (open-release/palm.master@03e3b67). Click here to learn what that means.
Patch has no changes to coverable lines.

Additional details and impacted files

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[e0d]

@mphilbrick211 this is a backport to the Palm release, can you ask BTR to review if/when the related PR merges to master?

[mphilbrick211]

@openedx/build-test-release-wg-security-patchers - is this something someone could please review/merge?

[cmltaWt0]

Read throughout the code, the PR is completely recreates the original PR to master. Merging.

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