Fix incorrect source filename references

Jian He reported the src/include/utility/tcop.h one and the remainder
were found by using a script to look for src/* and check that we have a
filename or directory of that name.

In passing, fix some out-date comments.

Reported-by: Jian He <jian.universality@gmail.com>
Reviewed-by: Tom Lane
Discussion: https://postgr.es/m/CACJufxGoE3H-7VgO02=PrR4SNuVWDVbfTyUnwO0HvS-Lxurnog@mail.gmail.com

src/fe_utils/astreamer_file.c

@@ -9,7 +9,7 @@
  * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
  *
  * IDENTIFICATION
- *		  src/bin/pg_basebackup/astreamer_file.c
+ *		  src/fe_utils/astreamer_file.c
  *-------------------------------------------------------------------------
  */
 

src/fe_utils/astreamer_gzip.c

@@ -20,7 +20,7 @@
  * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
  *
  * IDENTIFICATION
- *		  src/bin/pg_basebackup/astreamer_gzip.c
+ *		  src/fe_utils/astreamer_gzip.c
  *-------------------------------------------------------------------------
  */
 

src/fe_utils/astreamer_lz4.c

@@ -9,7 +9,7 @@
  * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
  *
  * IDENTIFICATION
- *		  src/bin/pg_basebackup/astreamer_lz4.c
+ *		  src/fe_utils/astreamer_lz4.c
  *-------------------------------------------------------------------------
  */
 

src/fe_utils/astreamer_tar.c

@@ -15,7 +15,7 @@
  * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
  *
  * IDENTIFICATION
- *		  src/bin/pg_basebackup/astreamer_tar.c
+ *		  src/fe_utils/astreamer_tar.c
  *-------------------------------------------------------------------------
  */
 

src/fe_utils/astreamer_zstd.c

@@ -9,7 +9,7 @@
  * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
  *
  * IDENTIFICATION
- *		  src/bin/pg_basebackup/astreamer_zstd.c
+ *		  src/fe_utils/astreamer_zstd.c
  *-------------------------------------------------------------------------
  */