[fix](bitmap) fix bitmap iterator comparison error

[luozenglin]

Proposed changes

Issue Number: close #15797

Problem summary

The problem is caused by the fact that bitmap.begin() == bitmap.end() is always true when the bitmap contains a single value.

Checklist(Required)

1. Does it affect the original behavior:
   • Yes
   • No
   • I don't know
2. Has unit tests been added:
   • Yes
   • No
   • No Need
3. Has document been added or modified:
   • Yes
   • No
   • No Need
4. Does it need to update dependencies:
   • Yes
   • No
5. Are there any changes that cannot be rolled back:
   • Yes (If Yes, please explain WHY)
   • No

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...

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[hello-stephen]

TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 36.15 seconds
load time: 518 seconds
storage size: 17122265584 Bytes
https://doris-community-test-1308700295.cos.ap-hongkong.myqcloud.com/tmp/20230110154814_clickbench_pr_77013.html

[morningman]

please link to an issue

[luozenglin]

please link to an issue

done

[cambyzju]

LGTM

[github-actions]

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

[github-actions]

PR approved by anyone and no changes requested.