Espressif: Fix i2c pullup detection #6126
Merged
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Related: #5906 and #5908.
The i2c pullup check usually passes on the the espressif port with floating pins. The fix is to disable the internal pullups when draining the bus prior to the pullup test. This is needed because internal pullups are on by default in espressif (#5931).
Tested on s3, c3 and s2.