Revert "sh/tests: Cut down builtins/read12.0 by 2 seconds"

Dag-Erling Smørgrav does not like this, but I do not understand why.

This reverts commit 1df431576f99c3cc26dd4ceb1a6eda864cc9f196.

sh/tests: Add a test for long line in history

sh/tests: Cut down builtins/read12.0 by 2 seconds

Since the test assumes a 250 ms response time, there is no need to delay
for 3 seconds. Instead, delay for the minimum possible 1 second.

Also, fix

sh/tests: Cut down builtins/read12.0 by 2 seconds

Since the test assumes a 250 ms response time, there is no need to delay
for 3 seconds. Instead, delay for the minimum possible 1 second.

Also, fix some assertions in builtins/read11.0 and builtins/read12.0. If
`set -e` is in effect, `foo` in `foo && bar` is considered tested and
therefore a failure does not cause the shell to exit.

Reviewed by: bdrewery
Differential Revision: https://reviews.freebsd.org/D55191

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