Add API class for text transforms ops

From: @peilin-wang
Reviewed-by: @robingrosman,@tom__chen
Signed-off-by: @robingrosman

change to test in graph mode

From: @peilin-wang
Reviewed-by: @robingrosman,@tom__chen
Signed-off-by: @robingrosman

From: @TFbunny
Reviewed-by: @robingrosman,@tom__chen
Signed-off-by: @robingrosman

From: @peilin-wang
Reviewed-by: @robingrosman,@tom__chen
Signed-off-by: @robingrosman

From: @david-he91
Reviewed-by: 
Signed-off-by:

From: @joylvliang
Reviewed-by: 
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From: @ginfung
Reviewed-by: 
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From: @liangzelang
Reviewed-by: @jjfeing,@zhoufeng54
Signed-off-by: @zhoufeng54

From: @yanglf1121
Reviewed-by: @liangchenghui,@kingxian
Signed-off-by: @liangchenghui,@kingxian

From: @TFbunny
Reviewed-by: @tom__chen,@robingrosman
Signed-off-by: @robingrosman

From: @rainyhorse
Reviewed-by: @lilongfei15,@kingxian
Signed-off-by: @kingxian

fix ci

fix ci

fix ci

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

fix ci

fix ci

From: @TFbunny
Reviewed-by: @tom__chen,@robingrosman
Signed-off-by: @robingrosman

From: @TFbunny
Reviewed-by: @tom__chen,@robingrosman
Signed-off-by: @robingrosman

From: @TFbunny
Reviewed-by: @tom__chen,@robingrosman
Signed-off-by: @robingrosman

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

From: @TFbunny
Reviewed-by: @robingrosman,@tom__chen
Signed-off-by: @tom__chen

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

From: @shenwei41
Reviewed-by: 
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From: @luoyang42
Reviewed-by: 
Signed-off-by:

fix sampler

From: @xulei2020
Reviewed-by: 
Signed-off-by:

From: @ezphlow
Reviewed-by: @robingrosman,@nsyca,@robingrosman
Signed-off-by: @robingrosman

Added validator checks

Added builtin sampler check

Added proper input check for samplers