pgsql: Convert a few more datatype input functions to report errors sof

Convert a few more datatype input functions to report errors softly.

Convert the remaining string-category input functions
(bpcharin, varcharin, byteain) to the new style.

Discussion: https://postgr.es/m/[email protected]

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/3b9d2deb67a0d5ee681561fc0e07c2dca4e26e96

Modified Files
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src/backend/utils/adt/encode.c | 35 +++++++++++++++++++++------------
src/backend/utils/adt/varchar.c | 33 ++++++++++++++++++-------------
src/backend/utils/adt/varlena.c | 8 +++++---
src/include/utils/builtins.h | 2 ++
src/test/regress/expected/char.out | 19 ++++++++++++++++++
src/test/regress/expected/char_1.out | 19 ++++++++++++++++++
src/test/regress/expected/char_2.out | 19 ++++++++++++++++++
src/test/regress/expected/strings.out | 25 +++++++++++++++++++++++
src/test/regress/expected/varchar.out | 19 ++++++++++++++++++
src/test/regress/expected/varchar_1.out | 19 ++++++++++++++++++
src/test/regress/expected/varchar_2.out | 19 ++++++++++++++++++
src/test/regress/sql/char.sql | 5 +++++
src/test/regress/sql/strings.sql | 6 ++++++
src/test/regress/sql/varchar.sql | 5 +++++
14 files changed, 203 insertions(+), 30 deletions(-)