Revert "[lldb/PlatformPOSIX] Change LoadImage default to RTLD_LAZY"

This reverts commit cb8c1ee269da72eb6e2c18800cd8ab0a74050785. The test
is failing on Debian for unknown reasons.

https://lab.llvm.org/buildbot/#/builders/68/builds/8990

GitOrigin-RevId: d8d5ef2e9d84fbbc2878b3fd977f9c62ea0661d7
8 files changed