Fix pytests and update build.sh to add ppc64le support. (#4413)

Signed-off-by: Sunidhi-Gaonkar1 <sunidhi.gaonkar@ibm.com>
Signed-off-by: Peter Zhu <zhujiaxi@amazon.com>
Co-authored-by: Peter Zhu <zhujiaxi@amazon.com>

Author: Sunidhi-Gaonkar1

Pipfile

@@ -4,8 +4,8 @@ verify_ssl = true
 name = "pypi"
 
 [packages]
-pyyaml = "~=5.4"
-types-PyYAML = "~=5.4"
+pyyaml = "~=6.0.1"
+types-PyYAML = "~=6.0.1"
 # TODO: The 'requests' package stays on 2.28 until we deprecate CentOS7.
 #       As newer version requires openssl1.1.1 where CentOS7 only provides openssl1.1.0.
 #       https://github.com/opensearch-project/opensearch-build/issues/3554
@@ -30,7 +30,7 @@ sortedcontainers = "~=2.4.0"
 cerberus = "~=1.3.4"
 psutil = "~=5.8"
 atomicwrites = "~=1.4.1"
-validators = "*"
+validators = "~=0.21.2"
 yamlfix = "~=1.0.1"
 yamllint = "~=1.27.1"
 pytablewriter = "~=0.64.2"