Remove Tag from exposed type

Author: c-thiel

aws/rust-runtime/aws-config/src/sts/assume_role.rs

@@ -204,8 +204,17 @@ impl AssumeRoleProviderBuilder {
     ///
     /// A list of session tags that you want to pass. Each session tag consists of a key name and an associated value.
     /// For more information, see `[Tag]`.
-    pub fn tags(mut self, tags: impl Into<Vec<Tag>>) -> Self {
-        self.tags = Some(tags.into());
+    pub fn tags<K, V>(mut self, tags: impl IntoIterator<Item = (K, V)>) -> Self 
+    where
+        K: Into<String>,
+        V: Into<String>{
+        self.tags = Some(
+            tags.into_iter()
+                // Unwrap won't fail as both key and value are specified.
+                // Currently Tag does not have an infallible build method.
+                .map(|(k, v)| Tag::builder().key(k).value(v).build().unwrap())
+                .collect::<Vec<_>>(),
+        );
         self
     }