bind tests: One more attempt to increase the timeouts

This is the last time I'm doing this before I rip these particular
tests out.

As far as I know there is no actual *problem* here, this is just
failing through a combination of macOS and Github Actions being slow
as molasses.

So it is wasting our time and therefore worse than not having these
tests at all, especially since they very rarely fail for good reasons.

We would leave some escape delay tests intact with generous timeouts, which would provide 90%
of the coverage with 10% of the hassle.

tests/pexpects/bind.py

@@ -86,7 +86,7 @@ expect_prompt(
 send("echo TEXT")
 send("\033")
 # Delay needed to allow fish to transition to vi "normal" mode.
-sleep(0.250)
+sleep(0.300)
 send("hhrAi\r")
 expect_prompt(
     "\r\nTAXT\r\n", unmatched="vi mode replace char, default timeout: long delay"
@@ -96,7 +96,7 @@ expect_prompt(
 send("echo MORE-TEXT")
 send("\033")
 # Delay needed to allow fish to transition to vi "normal" mode.
-sleep(0.250)
+sleep(0.300)
 send("xxxxx\r")
 
 # vi mode delete char, default timeout: long delay
@@ -159,9 +159,9 @@ expect_prompt()
 
 send("echo fail: lengthened escape timeout")
 send("\033")
-sleep(0.250)
+sleep(0.300)
 send("ddi")
-sleep(0.1)
+sleep(0.15)
 send("echo success: lengthened escape timeout\r")
 expect_prompt(
     "\r\nsuccess: lengthened escape timeout\r\n",