[BUG] Do not use the default 64MiB Shmem for database containers

[Vonng]

Describe the bug

Found nothing about shmem setup in kuberblocks, which will affect PostgreSQL relibility, especially when running parallel queries.

To Reproduce

https://github.com/search?q=repo%3Aapecloud%2Fkubeblocks%20shm&type=code

Expected behavior

Here are some operator examples:

• https://github.com/search?q=repo%3Aongres%2Fstackgres%20shm&type=code

• https://github.com/search?q=repo%3ACrunchyData%2Fpostgres-operator%20shm&type=code

• https://github.com/search?q=repo%3Azalando%2Fpostgres-operator%20shm&type=code

Screenshots

Desktop (please complete the following information):

Additional context

FYI:

PostgreSQL, Docker, and Shared Memory

docker-library/postgres#416

https://stackoverflow.com/questions/56839975/docker-shm-size-dev-shm-resizing-shared-memory

[nayutah]

redirect to #6014 , pls refer to it, thanks