Merge pull request !20119 from lixiachen/July_codex_fix

Merge pull request !19764 from harshvardhangupta/rem-build-2

Merge pull request !19610 from luoyang/optional-move

Merge pull request !19507 from lixiachen/remove_cacheop_builders

Merge pull request !19278 from xiefangqi/md_fix_log_print

Fix TFRecord get_dataset_size() when cached

Merge pull request !18439 from lixiachen/minor_cache_fix

Merge pull request !18199 from guozhijian/fix_file_path_valid

Merge pull request !18100 from zetongzhao/warn_fix

Merge pull request !18173 from harshvardhangupta/codecheck_fix_master

use dataset config to get prefetch size

Merge pull request !18106 from lixiachen/pclint_master

Merge pull request !18020 from lixiachen/fix_glogv0_hang

From: @hfarahat
Reviewed-by: @pandoublefeng,@robingrosman
Signed-off-by: @robingrosman

From: @ezphlow
Reviewed-by: 
Signed-off-by:

From: @lixiachen
Reviewed-by: @john_tzanakakis,@robingrosman
Signed-off-by: @robingrosman

From: @xiefangqi
Reviewed-by: @jonyguo,@liucunwei
Signed-off-by: @jonyguo

From: @ms_yan
Reviewed-by: @jonyguo,@liucunwei
Signed-off-by: @jonyguo

From: @mhmotallebi
Reviewed-by: @robingrosman,@pandoublefeng
Signed-off-by: @robingrosman

Fix anonymous enum CI warnings

From: @hfarahat
Reviewed-by: @pandoublefeng,@robingrosman
Signed-off-by: @robingrosman