ADAL to MSAL migration - update apache-spark-sql-connector.md

[ekote]

Context: As a way of ensuring that third-party apps / services migrate to MSAL and no new ADAL apps are created, we are looking to work on all our content that endorses / mentions ADAL or endorse products that use the same. We have identified the following doc(s) that need immediate attention.

Changes:

• get SP credentials via mssparkutils.credentials.getSecret
• remove adal library
• use msal to get the token

[prmerger-automator[bot]]

@ekote : Thanks for your contribution! The author(s) have been notified to review your proposed change.

[opbld33]

Learn Build status updates of commit b153081:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
articles/synapse-analytics/spark/data-sources/apache-spark-sql-connector.md	:white_check_mark:Succeeded

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

For any questions, please:

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[Jak-MS]

@midesa

• Can you review this PR?
• IMPORTANT: When this content is ready to merge, you must add #sign-off in a comment or the approval may get overlooked.

#label:"aq-pr-triaged" @MicrosoftDocs/public-repo-pr-review-team

[prmerger-automator[bot]]

@ekote : Thanks for your contribution! The author(s) have been notified to review your proposed change. @eskot

[opbld30]

Learn Build status updates of commit 9e27622:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
articles/synapse-analytics/spark/data-sources/apache-spark-sql-connector.md	:white_check_mark:Succeeded

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[ekote]

#sign-off

[prmerger-automator[bot]]

Invalid command: '#sign-off'. Only the assigned author of one or more file in this PR can sign off. @eskot

[midesa]

#sign-off

[prmerger-automator[bot]]

Invalid command: '#sign-off'. Only the assigned author of one or more file in this PR can sign off. @eskot

[ekote]

#sign-off

[prmerger-automator[bot]]

Invalid command: '#sign-off'. Only the assigned author of one or more file in this PR can sign off. @eskot

[ekote]

@midesa

• Can you review this PR?
• IMPORTANT: When this content is ready to merge, you must add #sign-off in a comment or the approval may get overlooked.

#label:"aq-pr-triaged" @MicrosoftDocs/public-repo-pr-review-team

@Jak-MS - could you please help with the merge? Misha has already approved it.