daemon: rename from "delete" job to "rm"

This commit fixes following FIXMEs:

// FIXME: rename "delete" to "rm" for consistency with the CLI command
// FIXME: rename ContainerDestroy to ContainerRm for consistency with the CLI command

Signed-off-by: lim seong yeol <seongyeol37@gmail.com>
Merge pull request #7659 from somaopensource/soma

 daemon: rename from "delete" job to "rm"