[HUDI-5970] support merge into multi update actions check

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Change Logs

#8133 (review)
as the pr comment, remove merge into update action check will cause data quality problems if source table without preCombineKey, add check to limit it.

• add check: merge into only supported one update action if the source table has no preCombineKey
• Supplementary test case for multi update actions

Impact

None

Risk level (write none, low medium or high below)

None

Documentation Update

Contributor's checklist

• Read through contributor's guide
• Change Logs and Impact were stated clearly
• Adequate tests were added if applicable
• CI passed

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CI report:

• 802d182 Azure: FAILURE Azure: SUCCESS

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