[improvement](resource-tag) limit the default user's resource tag to 'default'

[morningman]

Proposed changes

In previous, if user property 'resource_tags.location' is not set, the can use Backends with any resource tag.
It may confuse that when the DBA set part of Backends to resource group A, then the current existing user
should not be able to use this group A util it's 'resource_tags.location' is set.

So in this PR, I change the behavior, that if user property 'resource_tags.location' is not set, it can only use the
Backends with default tag.

Further comments

If this is a relatively large or complex change, kick off the discussion at dev@doris.apache.org by explaining why you chose the solution you did and what alternatives you considered, etc...

[morningman]

run buildall

[doris-robot]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 47.5 seconds
stream load tsv: 560 seconds loaded 74807831229 Bytes, about 127 MB/s
stream load json: 21 seconds loaded 2358488459 Bytes, about 107 MB/s
stream load orc: 65 seconds loaded 1101869774 Bytes, about 16 MB/s
stream load parquet: 32 seconds loaded 861443392 Bytes, about 25 MB/s
insert into select: 34.7 seconds inserted 10000000 Rows, about 288K ops/s
storage size: 17162302782 Bytes

[morningman]

run buildall

[morningman]

run buildall

[doris-robot]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 44.72 seconds
stream load tsv: 553 seconds loaded 74807831229 Bytes, about 129 MB/s
stream load json: 21 seconds loaded 2358488459 Bytes, about 107 MB/s
stream load orc: 64 seconds loaded 1101869774 Bytes, about 16 MB/s
stream load parquet: 32 seconds loaded 861443392 Bytes, about 25 MB/s
insert into select: 28.6 seconds inserted 10000000 Rows, about 349K ops/s
storage size: 17162257289 Bytes

[zddr]

LGTM

[github-actions]

PR approved by anyone and no changes requested.

[doris-robot]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 48.36 seconds
stream load tsv: 554 seconds loaded 74807831229 Bytes, about 128 MB/s
stream load json: 20 seconds loaded 2358488459 Bytes, about 112 MB/s
stream load orc: 65 seconds loaded 1101869774 Bytes, about 16 MB/s
stream load parquet: 32 seconds loaded 861443392 Bytes, about 25 MB/s
insert into select: 29.0 seconds inserted 10000000 Rows, about 344K ops/s
storage size: 17162233401 Bytes

[wangbo]

LGTM

[github-actions]

PR approved by at least one committer and no changes requested.