[Improvement](pipeline) support send eos on local exchange and remove some unused code

[BiteTheDDDDt]

Proposed changes

support send eos on local exchange and remove some unused code

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...

[BiteTheDDDDt]

run buildall

[github-actions]

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

[hello-stephen]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 45.84 seconds
stream load tsv: 504 seconds loaded 74807831229 Bytes, about 141 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: 30 seconds loaded 861443392 Bytes, about 27 MB/s
insert into select: 29.1 seconds inserted 10000000 Rows, about 343K ops/s
storage size: 17164139361 Bytes

[BiteTheDDDDt]

run buildall

[github-actions]

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

[hello-stephen]

(From new machine)TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 46.19 seconds
stream load tsv: 509 seconds loaded 74807831229 Bytes, about 140 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: 31 seconds loaded 861443392 Bytes, about 26 MB/s
insert into select: 30.0 seconds inserted 10000000 Rows, about 333K ops/s
storage size: 17167040153 Bytes

[xinyiZzz]

LGTM

[github-actions]

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

[github-actions]

PR approved by anyone and no changes requested.

[yiguolei]

if just remove the sender not send a null block to receiver. Then the receiver may not get eof signal?

[HappenLee]

The receiver just judge the eof by sender_number == 0;

[HappenLee]

LGTM