[LL FIR] FileStructure: resolve FirFile to body phase as all other elements

This is the correct behavior as we have to resolve to body phase
to build CFG and run diagnostics collector correctly

^KT-65780 Fixed

analysis/low-level-api-fir/testData/getOrBuildFir/annotations/fileAnnotation.txt

@@ -6,6 +6,6 @@ FIR element rendered:
 @FILE:R|kotlin/Suppress|[Types](names = vararg(String()))
 
 FIR FILE:
-FILE: [ResolvedTo(IMPORTS)] fileAnnotation.kt
+FILE: [ResolvedTo(BODY_RESOLVE)] fileAnnotation.kt
     @FILE:R|kotlin/Suppress|[Types](names = vararg(String()))
     [ResolvedTo(BODY_RESOLVE)] annotations container

analysis/low-level-api-fir/testData/getOrBuildFir/annotations/fileAnnotationScript.txt

@@ -6,7 +6,7 @@ FIR element rendered:
 @FILE:R|kotlin/Suppress|[Types](names = vararg(String()))
 
 FIR FILE:
-FILE: [ResolvedTo(IMPORTS)] fileAnnotationScript.kts
+FILE: [ResolvedTo(BODY_RESOLVE)] fileAnnotationScript.kts
     @FILE:R|kotlin/Suppress|[Types](names = vararg(String()))
     [ResolvedTo(BODY_RESOLVE)] annotations container
     context(<script>@kotlin.script.templates.standard.ScriptTemplateWithArgs)

analysis/low-level-api-fir/testData/getOrBuildFir/annotations/useSite/file.txt

@@ -6,7 +6,7 @@ FIR element rendered:
 @FILE:R|Ann|[Types]()
 
 FIR FILE:
-FILE: [ResolvedTo(IMPORTS)] file.kt
+FILE: [ResolvedTo(BODY_RESOLVE)] file.kt
     @FILE:R|Ann|[Types]()
     [ResolvedTo(BODY_RESOLVE)] annotations container
     public final [ResolvedTo(STATUS)] annotation class Ann : R|kotlin/Annotation| {

analysis/low-level-api-fir/testData/getOrBuildFir/annotations/useSite/fileScript.txt

@@ -6,7 +6,7 @@ FIR element rendered:
 @FILE:R|Ann|[Types]()
 
 FIR FILE:
-FILE: [ResolvedTo(IMPORTS)] fileScript.kts
+FILE: [ResolvedTo(BODY_RESOLVE)] fileScript.kts
     @FILE:R|Ann|[Types]()
     [ResolvedTo(BODY_RESOLVE)] annotations container
     context(<script>@kotlin.script.templates.standard.ScriptTemplateWithArgs)