Revert "deps: backport b5135bbc from c-ares repo"

This reverts commit 896e19330ad06ace8973c5d7b75d2de538228062.

Proper handling of TXT records requires API change, we can't afford it
in v0.10.

See #7371 for details.
Merge remote-tracking branch 'upstream/v0.10' into v0.10