[ObjC] Move GenerateHeader over to Printer::Emit.

Update ImportWriter to have a second Emit api for the runtime files to
streamline things a bit better.

PiperOrigin-RevId: 492210147

objectivec/GPBAny.pbobjc.h

diff --git a/objectivec/GPBAny.pbobjc.h b/objectivec/GPBAny.pbobjc.h
index cb2b4f7..bb19e5f 100644
--- a/objectivec/GPBAny.pbobjc.h
+++ b/objectivec/GPBAny.pbobjc.h
@@ -177,4 +177,4 @@
 
 // @@protoc_insertion_point(global_scope)
 
-// clange-format on
+// clang-format on

objectivec/GPBApi.pbobjc.h

diff --git a/objectivec/GPBApi.pbobjc.h b/objectivec/GPBApi.pbobjc.h
index 877a0b5..bbae2ed 100644
--- a/objectivec/GPBApi.pbobjc.h
+++ b/objectivec/GPBApi.pbobjc.h
@@ -298,4 +298,4 @@
 
 // @@protoc_insertion_point(global_scope)
 
-// clange-format on
+// clang-format on

objectivec/GPBDuration.pbobjc.h

diff --git a/objectivec/GPBDuration.pbobjc.h b/objectivec/GPBDuration.pbobjc.h
index 223d262..05c63d8 100644
--- a/objectivec/GPBDuration.pbobjc.h
+++ b/objectivec/GPBDuration.pbobjc.h
@@ -133,4 +133,4 @@
 
 // @@protoc_insertion_point(global_scope)
 
-// clange-format on
+// clang-format on

objectivec/GPBEmpty.pbobjc.h

diff --git a/objectivec/GPBEmpty.pbobjc.h b/objectivec/GPBEmpty.pbobjc.h
index d027837..3de240d 100644
--- a/objectivec/GPBEmpty.pbobjc.h
+++ b/objectivec/GPBEmpty.pbobjc.h
@@ -60,4 +60,4 @@
 
 // @@protoc_insertion_point(global_scope)
 
-// clange-format on
+// clang-format on

objectivec/GPBFieldMask.pbobjc.h

diff --git a/objectivec/GPBFieldMask.pbobjc.h b/objectivec/GPBFieldMask.pbobjc.h
index db4e76a..3e7d349 100644
--- a/objectivec/GPBFieldMask.pbobjc.h
+++ b/objectivec/GPBFieldMask.pbobjc.h
@@ -261,4 +261,4 @@
 
 // @@protoc_insertion_point(global_scope)
 
-// clange-format on
+// clang-format on

objectivec/GPBSourceContext.pbobjc.h

diff --git a/objectivec/GPBSourceContext.pbobjc.h b/objectivec/GPBSourceContext.pbobjc.h
index 6736828..a55939a 100644
--- a/objectivec/GPBSourceContext.pbobjc.h
+++ b/objectivec/GPBSourceContext.pbobjc.h
@@ -65,4 +65,4 @@
 
 // @@protoc_insertion_point(global_scope)
 
-// clange-format on
+// clang-format on

objectivec/GPBStruct.pbobjc.h

diff --git a/objectivec/GPBStruct.pbobjc.h b/objectivec/GPBStruct.pbobjc.h
index 2196639..9bedafc 100644
--- a/objectivec/GPBStruct.pbobjc.h
+++ b/objectivec/GPBStruct.pbobjc.h
@@ -192,4 +192,4 @@
 
 // @@protoc_insertion_point(global_scope)
 
-// clange-format on
+// clang-format on

objectivec/GPBTimestamp.pbobjc.h

diff --git a/objectivec/GPBTimestamp.pbobjc.h b/objectivec/GPBTimestamp.pbobjc.h
index e0566da..a374a0a 100644
--- a/objectivec/GPBTimestamp.pbobjc.h
+++ b/objectivec/GPBTimestamp.pbobjc.h
@@ -162,4 +162,4 @@
 
 // @@protoc_insertion_point(global_scope)
 
-// clange-format on
+// clang-format on

objectivec/GPBType.pbobjc.h

diff --git a/objectivec/GPBType.pbobjc.h b/objectivec/GPBType.pbobjc.h
index 02388b0..6eb1d04 100644
--- a/objectivec/GPBType.pbobjc.h
+++ b/objectivec/GPBType.pbobjc.h
@@ -432,4 +432,4 @@
 
 // @@protoc_insertion_point(global_scope)
 
-// clange-format on
+// clang-format on

objectivec/GPBWrappers.pbobjc.h

diff --git a/objectivec/GPBWrappers.pbobjc.h b/objectivec/GPBWrappers.pbobjc.h
index 463bc57..11e220b 100644
--- a/objectivec/GPBWrappers.pbobjc.h
+++ b/objectivec/GPBWrappers.pbobjc.h
@@ -207,4 +207,4 @@
 
 // @@protoc_insertion_point(global_scope)
 
-// clange-format on
+// clang-format on