Fix an issue tsh throws assertion error on REDIS_REPLY_STATUS for Redis 7

[greedy52]

Fixes #19240

• AWS Redis ElastiCache 7.0.4 Engine Version failing to connect #19240

Error from tsh db connect <redis-7>

$ tsh db connect --db-user=test marek-redis07
Assertion failed: (flags->element[j]->type == REDIS_REPLY_STATUS), function cliAddArgument, file redis-cli.c, line 585.
ERROR: signal: abort trap

Root cause:
redis-cli sends COMMAND DOCS to construct docs for commands and expect status type (+<status>) as part of the response. The go-redis driver however reads status into golang strings and writes them as string types ($<len><string>).

Changes:

• Driver side change: Fix an issue writer cannot write status type (+) redis#22
• Adding a UT for regression test

Notes:

• COMMAND DOCS is new to Redis 7, so using redis-cli 6.2 would not see this issue
• There was a test escpae from my side when first testing out Redis 7 as I was testing with a user without COMMAND XXX permissions so redis-cli will always get NO PERM thus not seeing this error.

[greedy52]

caught this when go mod tidy tries to add this a "direct" dependency

[github-actions]

@greedy52 See the table below for backport results.

Branch	Result
branch/v11	Failed