Hive: fix incorrect L027 error for rowtype attribute name

[KulykDmytro]

In Hive dialect there is a false positive violation detected in rowtype definition when query/subquery operates with join

select cast(row(t1.attr, t2.attr) as row(fld1 double, fld2 double)) as flds
from sch.tab1 as t1
join sch.tab2 as t2 on t2.id = t1.id

fld1, fld2 interpret as table column alias rather than rowtype attribute name

[tunetheweb]

LGTM.

One nit on the comment.

[codecov]

Codecov Report

Merging #2893 (16a7609) into main (5b45e2a) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              main     #2893   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          163       163           
  Lines        12660     12660           
=========================================
  Hits         12660     12660           

Impacted Files	Coverage Δ
src/sqlfluff/dialects/dialect_hive.py	100.00% <ø> (ø)

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