AppArmor profile update for PGroonga + MeCab tokenizer

[pcnc]

What kind of change does this PR introduce?

• PGroonga was failing to initialize the newly introduced MeCab tokenizer introduced in chore: add pgroonga MeCab tokenizer support #462:

type=AVC msg=audit(1673528594.152:92): apparmor="DENIED" operation="open" profile="/usr/lib/postgresql/bin/postgres" name="/usr/local/lib/groonga/plugins/tokenizers/mecab.so" pid=2301 comm="postgres" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
type=AVC msg=audit(1673529033.829:138): apparmor="DENIED" operation="open" profile="/usr/lib/postgresql/bin/postgres" name="/etc/mecabrc" pid=2941 comm="postgres" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
type=AVC msg=audit(1673529088.150:150): apparmor="DENIED" operation="open" profile="/usr/lib/postgresql/bin/postgres" name="/var/lib/mecab/dic/naist-jdic/dicrc" pid=3004 comm="postgres" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0

• This updates the Postgres profile so that the database process can access required files