[SPARK-44175] Remove useless lib64 path link in dockerfile

### What changes were proposed in this pull request?
Remove useless lib64 path

### Why are the changes needed?
Address comments: docker-library/official-images#13089 (comment)

It was introduced by apache/spark@f13ea15 to address the issue about snappy on alpine OS, but we already switch the OS to ubuntu, so `/lib64` hack can be cleanup.

### Does this PR introduce _any_ user-facing change?
No

### How was this patch tested?
CI passed

Closes #48 from Yikun/rm-lib64-hack.

Authored-by: Yikun Jiang <[email protected]>
Signed-off-by: Yikun Jiang <[email protected]>

Author: Yikun

3.4.0/scala2.12-java11-ubuntu/Dockerfile

@@ -23,7 +23,6 @@ RUN groupadd --system --gid=${spark_uid} spark && \
 
 RUN set -ex; \
     apt-get update; \
-    ln -s /lib /lib64; \
     apt-get install -y gnupg2 wget bash tini libc6 libpam-modules krb5-user libnss3 procps net-tools gosu libnss-wrapper; \
     mkdir -p /opt/spark; \
     mkdir /opt/spark/python; \

3.4.1/scala2.12-java11-ubuntu/Dockerfile

@@ -23,7 +23,6 @@ RUN groupadd --system --gid=${spark_uid} spark && \
 
 RUN set -ex; \
     apt-get update; \
-    ln -s /lib /lib64; \
     apt-get install -y gnupg2 wget bash tini libc6 libpam-modules krb5-user libnss3 procps net-tools gosu libnss-wrapper; \
     mkdir -p /opt/spark; \
     mkdir /opt/spark/python; \

Dockerfile.template

@@ -23,7 +23,6 @@ RUN groupadd --system --gid=${spark_uid} spark && \
 
 RUN set -ex; \
     apt-get update; \
-    ln -s /lib /lib64; \
     apt-get install -y gnupg2 wget bash tini libc6 libpam-modules krb5-user libnss3 procps net-tools gosu libnss-wrapper; \
     mkdir -p /opt/spark; \
     mkdir /opt/spark/python; \