Replace private API encodeURI with public API SigV4_EncodeURI

[kar-rahul-aws]

Description

This PR removes the redundant private API encodeURI with public API SigV4_EncodeURI introduced in #89 .

Test Steps

cmake -S test -B build/ -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Debug -DUNITTEST=ON -DCMAKE_C_FLAGS='--coverage -Wall -Wextra -DNDEBUG -DLOGGING_LEVEL_DEBUG=1'
cd build/
make coverage
cd ..
declare -a EXCLUDE=("\*test\*" "\*CMakeCCompilerId\*" "\*mocks\*")
echo ${EXCLUDE[@]} | xargs lcov --rc lcov_branch_coverage=1 -r build/coverage.info -o build/coverage.info
lcov --rc lcov_branch_coverage=1 --list build/coverage.info

Before applying the patch

Summary coverage rate:
  lines......: 99.8% (931 of 933 lines)
  functions..: 98.2% (54 of 55 functions)
  branches...: 100.0% (497 of 497 branches)
Reading tracefile build/coverage.info
                         |Lines       |Functions  |Branches    
Filename                 |Rate     Num|Rate    Num|Rate     Num
===============================================================
[/home/ubuntu/Temp/kar-rahul-aws/karahulx_SigV4/SigV4-for-AWS-IoT-embedded-sdk/source/]
sigv4.c                  |99.8%    886|98.0%    51| 100%    475
sigv4_quicksort.c        | 100%     47| 100%     4| 100%     22
===============================================================
                   Total:|99.8%    933|98.2%    55| 100%    497

After applying the patch

Summary coverage rate:
  lines......: 100.0% (933 of 933 lines)
  functions..: 100.0% (55 of 55 functions)
  branches...: 100.0% (497 of 497 branches)
Reading tracefile build/coverage.info
                         |Lines       |Functions  |Branches    
Filename                 |Rate     Num|Rate    Num|Rate     Num
===============================================================
[/home/ubuntu/Temp/kar-rahul-aws/karahulx_SigV4/SigV4-for-AWS-IoT-embedded-sdk/source/]
sigv4.c                  | 100%    886| 100%    51| 100%    475
sigv4_quicksort.c        | 100%     47| 100%     4| 100%     22
===============================================================
                   Total:| 100%    933| 100%    55| 100%    497

Checklist:

• I have tested my changes. No regression in existing tests.
• I have modified and/or added unit-tests to cover the code changes in this Pull Request.

Related Issue

#89

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[kar-rahul-aws]

/bot run formatting